I have 2.7 on a 2.5 APM - the problem is that when I select RTL or AUTO the throttle cuts out.
I have read previous posts on this however on reviewing the logs the altitude is correct, the airspeed is working and is correct. Stabilise works and a have done several flights with manual and stabilise working OK.
RTL does work as when I selected it the Finwing Penguin glided back to home fine. I did set the AUTO altitude to 75M and it was at 120M when I selected RTL. However all ground tests have the throttle cut out.
I have auto pilot throttle percent at 50% and have written and read back the correct value.
I am sure the is something simple I am missing.